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Finding the Fourth Proportional to 18,689.91, 25,794.13 and 11,518.37

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Solution

The fourth proportional to 18,689.91, 25,794.13 and 11,518.37 is: 15,896.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.91 : 25,794.13 = 11,518.37 : x
  2. Step 2: Convert to fraction form
    18,689.91/25,794.13 = 11,518.37/x
  3. Step 3: Cross multiply
    18,689.91x = 25,794.13 × 11,518.37
  4. Step 4: Simplify right side
    18,689.91x = 297,106,333.17
  5. Step 5: Solve for x
    x = 297,106,333.17/18,689.91
  6. Step 6: Final answer
    x = 15,896.62

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.